You can use simple number functions to perform useful percent calculations on your data. Simple number functions include addition, subtraction, multiplication, and division.

Function Description Examples
* Returns the result of multiplying both numbers.
• `3 * 2 = 6`
• `price * taxrate`
+ Returns the result of adding both numbers.
• `1 + 2 = 3`
• `price + shipping`
- Returns the result of subtracting the second number from the first.
• `3 - 2 = 1`
• `revenue - tax`
/ Returns the result of dividing the first number by the second.
• `6 / 3 = 2`
• `markup / retail price`

## Calculate percentages

Calculating percentages is useful when you want to see, for example, the percentage of revenue that each retail department generates (gifts, bakery, canned goods, etc.).

Create a formula called `Percent Revenue` in the Formula Assistant:

`( sum ( revenue ) / group_sum ( revenue ) ) * 100`

Replace `revenue` with your company’s name for their `revenue` column, such as `revenue_dollar_amount`.

Now you can see the percentage of your total revenue that each department contributes, using the percent revenue formula that you just created. See the example below. 